A convergent plate boundary is a type of tectonic boundary where two lithospheric plates are moving towards each other. This movement can result in three different types of convergent boundaries: oceanic-oceanic convergence, oceanic-continental convergence, and continental-continental convergence.

In oceanic-oceanic convergence, two oceanic plates collide. One plate is usually subducted beneath the other due to its higher density. This subduction creates a deep ocean trench and can lead to the formation of volcanic arcs, such as the Aleutian Islands in Alaska.

In oceanic-continental convergence, an oceanic plate collides with a continental plate. The denser oceanic plate is subducted beneath the less dense continental plate, creating a subduction zone. This can result in the formation of coastal mountain ranges, such as the Andes in South America.

In continental-continental convergence, two continental plates collide. Since continental crust is less dense than oceanic crust, subduction does not occur. Instead, the collision causes the crust to buckle and fold, leading to the formation of large mountain ranges, such as the Himalayas in Asia.

Convergent plate boundaries are associated with intense geological activity, including earthquakes, volcanic eruptions, and the formation of mountain ranges.